On the panel from right: Leesa Hubbard, teacher in residence, Sally Ride Science, San Diego; David Lehman, GRAIL project manager, NASA's Jet Propulsion Laboratory, Pasadena, Calif.; Maria Zuber, GRAIL principal investigator, Massachusetts Institute of Technology, Cambridge and Jim Green, director, Planetary Science Division, NASA Headquarters, Washington are seen at a press briefing to discuss the upcoming launch to the moon of the Gravity Recovery and Interior Laboratory (GRAIL) mission, Thursday, Aug. 25, 2011 in Washington. Photo Credit: (NASA/Carla Cioffi)